Pin psycopg2 to version 2.7.7. It's the last version with psycopg1

compatibility support.

The roundup trunk has psycopg2 native support, but not the maint-1.6
branch at this time. If version 2.0 release is delayed, maybe the
psycopg2 patches need to be backported.

Author: rouilj

.travis.yml

@@ -33,7 +33,8 @@ before_install:
 
 install:
   - pip install mysqlclient==1.3.13
-  - pip install MySQL-python psycopg2 pytz whoosh
+  - pip install MySQL-python pytz whoosh
+  - pip install psycopg2==2.7.7
   # errors during build with:
   # make: *** No rule to make target '/gpgme.h', needed by 'gpgme.h'.  Stop.
   # ... gcc: error: gpgme_wrap.c: No such file or directory